Rotary pump



Nov. 19, 1929. B. E. PARKS 1,736,666

ROTARY PUMP Filed Sept. 20, 1926 3 Sheets-Sheet l iZgn l I INVENTOR. W IZZQZ I :25 017, E. P41171 ATTORNEYS.

Nov. 19, 1929. B. E. PARKS 1,736,666

ROTARY PUMP Filed Sept. 20. 1926 isheets-sheet 2 INVENTOR.

M: W- Q A TTORNEYS.

B ron EJ 41045 BY 7 Nov. 19, 1929.

B. E. PARKS ROTARY PUMP Filed Sept. 20, 1926 3 Sheets-Sheet (L /0W W. HA9 ATTORNEYS.

az 1 M- Patented Nov. 19, 1929 g p UNITED STATES PATENT QFFICE BYRON E. PARKS, OF WALKER TOWNSHIP, KENT COUNTY, MICHIGAN ROTARY PUMP Application filed September 20, 1926. Serial No. 136,424.

The present invention relates to rotary pump is illustrated comprising a body or caspumps; and its object is, generally, to proing1havingacross-sectionally circular chamvide such a pump improved in certain reher 2 with oppositely disposed inlet ports 3 spects hereinafter appearing; and more parand outlet ports 4 through its concave.v side,

5 ticularly, to provide in such a pump fluidand a cross-sectionally circular piston 5 hav- 55 propelling vanes moved into operative posiing a shaft 6 journalled in bearings 7 in the tion by the centrifugal force created by the bushings 8 carried in the openings 9 through revolving piston, and in such manner as to the ends 10 of the chamber, the piston being minimize their frictional contact with the rotated by means (not shown) applied to its 10 pum casing; and further, to provide means shaft, and the bearings 7 being axially oflset 60 for t us moving such vanes by fluid pressure below and parallelly with the longitudinal in the pump; and further, to provide in such axis of said chamber as shown. The piston a pump means for returning to its operative has recesses 11 extending toward their mouths field any fluid which may pass into the pis- 12 in a direction inclined rearwardly from 15 tons rotative bearings; and further, to prothe radius 13 of the piston which intersects 65 Vide means for preventing the vanes from enthe mouth of the recess in the pistons periphgaging in the ports of the pump; and further, ery; that is, there'cess'es are inclined thus to provide means for preventing the pistons rearwardly in relation to the pistons direcaxial movement or end-thrust. tion of rotation. These recesses form bear- These and any other objects hereinafter apings in which the vanes 14 freely move slid 7 pearing are attainedby, and the invention ably. finds preferable embodiment in, the pump It will be seen that, as the piston rotates, structure hereinafter particularly described centrifugal force moves these vanes outwardin the body of this specification and illusly; but that the centrifugal component of the trated by the accompanying drawings, in force acting on the vanes is less than if the which vanes were mounted to move radially of the Figure 1 is a side view of a rotary pump; piston instead of in the inclined direction de- Figure 2 is a transaxial sectional view scribed; and that inasmuch as this centrifuthereof taken on line 22 of Figure 3; gal component is less, the friction between 30 Figure 3 is a side view of the same, parthe vanes outer edge portions 15 and the in tially sectioned axially on line 33 of Figner surface of the casing is less. It will also ures 1 and 2; be seen that the inclined front sides 16 of these Figure 4 is a side view of the pumps rotavanes pressing on the fluid being pumped tive piston; tends to slide the vanes inwardly in their 35 Figure 5 is a sectional view of the body or recess bearings 11, so that a port-ion of the casing of the pump, taken on line 5-5 of Figfluid may leak rearwardly'oversaid edge porure 2; I tions thereby relieving the pump from undue Figure 6 is a transaxial sectional view of strain in case the piston is rotating too rapidthe piston, taken on line 66 of Figure 4; 1y. This eflect is increased by forming the 7 40 Figure 7 is a like sectional view (enlarged) outer edge portions 15 of the vanes somewhat of a portion of the same and of one of the inclined forwardly-inwardly from the chamvanes, taken on a plane corresponding to line bers concave surface, as shown.

7-7 of Figure 4; It is evident that the pumps may be con- Figure 8 is a sectional view (much enstructed in diflerent sizes, or their parts in- 45 larged) of certain parts, taken on line 88 terrelatively proportioned, and the degree of of Figure 7; and inclination o the recesses 11 so formed, as

Figure 9 is a development of the concave to accommodate the pumps to different reinner surface of the casing of the pump, illus quirements or uses.

trating the position of the ports thereof. The piston has fluid passages 17 extending In the accompanying drawings, a rotary from its curved side into the bottom of the recesses 11 behind the inner edgesrlS of the vanes therein, so that the pumped fluid in the chamber 2 may pass through said passages and press the vanesoutwardly. These passages are shown provided with valves comprising a screw 19 threadedin the passage and having a conical inner end 20 and a fluid opening 21 venting at 22 through the side of said conical end. By turning this screw the '10 passagemay be opened or closed to the desired degree. In order that the outer end portions of the vanes may not engage in the ports 3, 4 in passing thereover, the opposite walls 23 of these ports extend in a helical direction about the axis of the chamber 2; and to balance the piston against axial movement or end thrusts, the walls of some ofthe ports extend helically oppositely to'the walls of others of said ports; the walls of the inlet ports 3 thus extending or winding in a helical direction opposite to that of the walls of the outlet ports 4, as shown in the development Figure 9.

Fluid passages extend from the bearings 18 7 downwardly and through the concave side of the chamber 2, venting into the chamber,

, to return to the field of the pumps operation any fluid which may pass into the rotative bearings 7, said fluid passages, as seen in Fig- 30 ure 3, comprising annulargrooves 25 in the bushings 8, radial openings 26, therein, and a pipe 27. These bushings are held in place, with packing 28 at their inner ends, by collars 29 whose flanges 30 are engaged by nuts 31 on the bolts 32.

I claim:

In a device of the character described, a body having a circular chamber provided with inlet and outlet ports, a piston rotatable in said chamber having tangential recesses therein, vanes slidable in said recesses, said piston having partially threaded ports herein communicating with said reeesses ehind said vanes and with said chamber, a valve for controlling the flow of the pumped fluid through said ports to the recesses including a hollow member provided with a threaded portion cooperating with the threadedport, and a reduced portion terminating in a conical end and having a duct therethrough, the said ports having inclined walls at the inner ends thereof cooperating with the conical end of the valve to control the flow of 'fluid to the recesses, means for adjusting said valve to regulate said flow, and means for locking the same in adjusted position. 7

In testimony whereof-I have hereunto set my hand at rand Rapids, Michigan, this 10th day of eptember, 1926.

, BYRON -E. PARKS. 

